ACIDITY OF MODIFIED MORDENITES SYNTHESIZED FROM RICE HUSK SILICA AND CATALYTIC TRANSFORMATION OF METHYLBUTYNOL

Mordenite (MOR) was synthesized using rice husk silica and modified by base (B), acid (A) or acid-base (AB) and converted to H-form. The modification did not destroy the MOR structure but increased surface area and generated mesopores. Lewis acidity of the parent and modified MOR samples investigate...

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Bibliographic Details
Published in:Química Nova 2015-02, Vol.38 (2), p.191-195
Main Authors: Kulawong, Sittichai, Prayoonpokarach, Sanchai, Roessner, Frank, Wittayakun, Jatuporn
Format: Article
Language:English
Subjects:
acidity
CHEMISTRY, MULTIDISCIPLINARY
methylbutynol
mordenite modification
Online Access:Get full text
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Summary:Mordenite (MOR) was synthesized using rice husk silica and modified by base (B), acid (A) or acid-base (AB) and converted to H-form. The modification did not destroy the MOR structure but increased surface area and generated mesopores. Lewis acidity of the parent and modified MOR samples investigated by aluminum NMR and NH3-TPD showed a decrease in the following order: HMOR > BMOR > ABMOR > AMOR. For the catalytic transformation of methylbutynol, ABMOR provided the highest conversion and selectivity of products from acid sites.
ISSN:0100-4042
1678-7064
DOI:10.5935/0100-4042.20150002